Driveline Vibration Part 2

[Kros383SS]

Ok I going to solve this problem once and for all...I hope.

The only thing original on the truck since the old setup is the rearend and drop kit but playing with the pinion angle seems to change the vibration intensity.

Right now its set at maybe -1* on the trans/eng and the rearend is -3to4* pinion angle.

The vib is really noticable now at this setting at the speed of 65-70mph and the faster you go I guess the harmonics of it change and it smooths out.

Look at the crappy way DJM adj. pinion angle...

[SLO TRUCK]

I am having the same problem, i am just trying different shims looks like i need the 2* shims

[Kros383SS]

I am having the same problem, i am just trying different shims looks like i need the 2* shims

Well at least I can say Im not the only one with this problem. Only thing is mine doesnt use shims.

Whats ur lowering setup?

[tanz45]

I would take off that clamp style flip quick and weld some perches on there. That thing is gonna spin and break stuff.

[Justin_Inc]

I would take off that clamp style flip quick and weld some perches on there. That thing is gonna spin and break stuff.

X2, thats a pretty 'ugly' flip kit... Make sure you know your angles for sure (dont guess).

[Wtfan18]

hey man any progress lately??? i finally had time this morning to throw mine up on 4 cylinder blocks on the garage floor and measure out my pinion angle. currently my Transmission is sitting at -2 degrees and my rear end is at a positive 5 degrees. i want the driveline angle to be at -2 degrees so im 5 degrees out of wack on the rear end and already have a 4 degree shim in there. im hoping this is whats causing my vibrations which is only muliplied by that fact that i have 4:56 gears and the shaft is turning pretty fast. do you have any idea if CalTracs allow you to adjust pinion angle? or how the heck your supposed to compensate for being so many degrees off. thanks bud hope all is well with the truck!

[r6z4o6]

Was the vibe present before the swap?

Checked the tires/wheels for out of balance?

Have you put it on jackstands yet????

Compared to Wtfan, your pinion angle is in the money. Sounds like if you shimmed your tranny UP to the 3* to match teh rear, then they would be parallel but opposite....like they should be. I think you have another issue other than the pinion angle.

[DBRODS]

Was the vibe present before the swap?

Checked the tires/wheels for out of balance?

Have you put it on jackstands yet????

Compared to Wtfan, your pinion angle is in the money. Sounds like if you shimmed your tranny UP to the 3* to match teh rear, then they would be parallel but opposite....like they should be. I think you have another issue other than the pinion angle.

Hey whats up, are you in Hutto... I drive through Hutto everyday atleast twice.

[r6z4o6]

Yeppers, offa 1660 north. I get on Chandler road and zip to Georgetown to get to work everyday. Where is your shop located at????

[DBRODS]

Yeppers, offa 1660 north. I get on Chandler road and zip to Georgetown to get to work everyday. Where is your shop located at????

I live in Round Rock off Sam Bass and my shop is in Circleville..just north of Taylor off 1331 next to the Lake. Right across the street from the water treatment plant..